Grinder mechanism



My 1, 1930. w. TRAUD 1,769,870

I onmnza iuacmmxsu Filed lay 3. 192a 2 Shuts-Shut 1 y 1, 3- w. A. TRAUD1,769,870

' GRIIIDER NECHANISI Filed a373, 1923 2 Sheets-Sheet 2 93 INVENTOR.

ATTORNEY."

Patented July I, 1930 PATENT OFFICE I WILLIAM A. TRAUD, or NEWARK, NEW,JERSEY GRINDER MECHANISM Application filed. May 3, 1928. Serial No.274,874.

This invention relates to a grinder mechanism designed primarily for thesharpening of the cutting unit of leather shaving machines, but it is tobe understood that a grinder mechanism, in accordance with thisinvention may be employed in any connection for which itis foundapplicable, and the invention has for its object to-provide, in a manneras hereinafter set forth, a machine of the class referred to capable ofbeing so disposed with respect to a rotatable, cylindrical cutting unitfor sharpening the same simultaneously with the operation thereof toprovide a true round therefor thereby resulting in a uniform cut by theunit.

A further object of the invention is to provide, in a manner ashereinafter set forth,

a grinder mechanism including an abrading,

grinding or sharpening elements bodily ishiftable, while revolving by atravelling carrier and with the mechanism further including means forautomatically reversing the direction of the travel of the carrier toprovide for the latter to alternately travel in opposite'directions withrespectto the ob ject being acted upon by the abrading, grinding orsharpening element.

A further object of the invention is to provide, in a manner ashereinafter set forth,

a grinder mechanism including a driven, revoluble bearing elementmounted upon a fixed shaft and having secured thereto an abrading,grinding or sharpening element, and with the shaft connected to atravelling carriage whereby the bearing and abrading elements will bebodily moved on the travel of the carriage to provide for the abradingelement, while revolving, traversing the object upon which such'abrading "element is acting to sharpen the same.

A further object of the invention is to provide, in a manner ashereinafter set forth, a grinder mechanism including a revoluble, bodilyshiftable, adjustable abrading, grinding or sharpening element capableof being adjusted toward and from the object being sharpened and furthertraversing the object in alternatedirections when acting on the same tosharpen it.

Further objects of the mvention are to provide, in a manner ashereinafter set forth, a grinder mechanism which is simple in itsconstruction and arrangement, strong, durable, compact, including anabrading element traversing the object acted upon alternately inopposite directions, automatically reversing the direction of the travelof such element, thoroughly 'efficient in its use, readily assembled,adjustable, and comparatively inexpensive to set up.

With the foregoing and other objectsin view the invention consists ofthe novel construction, combination and arran ement of parts ashereinafter more specifically described, and illustrated in theaccompanying drawings, wherein is shown an embodiment of the invention,but it is to be understood that changes, variations and modificationscan be resorted to which fall within the scope of the claims hereuntoappended.

In the drawings wherein like reference characters denote correspondingparts throughout the several views vFigure 1 is a side elevation of agrinder mechanism in accordance with this invention showing theadaptation thereof with respect to a rotatable cuttin unit or cylinderof a leather shaving mac ine.

Figure 2 is a top plan View of the mechanism and further showing theadaptation thereof with respect to a rotatable cutting unit or'cylinderof a leather shaving machine.

Figure 3 is a fragmentary View, partly in section looking toward therear of the mechanism. r I

Figure 4 is a cross sectional view of the mechanism and furtherillustrating the same positioned with respect to a rotatable cuttingunit or cylinder. p

Figure 5 is a fragmentary view in section of the mechanism and taken onsection line 5-5 Figure-4:.

Figure 6 is a fragmentary view in elevation of one of the supportsemployed for the mechanism looking in the direction of the arrow AFigure 3. Y A grinder mechanism, in accordance with this invention, isillustrated, by way of exa a y 1,769,870

able cutting unit of a leather shaving machine.

In the drawings 10 and 11 denote the side frames of the supportingstructure or body portion of a leather shaving machine, 12 the rotatablecutting unit comprising a cylinder 13 carrying lengthwise thereofcutters or blades 14. and formed with spindles 15 mounted in andextended from bearings 16. The spindles 15 have driven pulleys 17operated from belts 18 for rotatina the cutting unit. Bearin 16 aremounted on the top of the side rames 10 and 11. The foregoing elementsare illustrated so that one can readily understand the adaptation of ahiding mechanism, in accordance with this invention with res ct to acutting unit.

The grinder mec anism includes an abrading,gr1nding or sharpening disc19 hereinafter referred to as an abrading disc and which is to operateon the top of the cutting unit and bodily travels, while revolvinglerfthwise with respect to the cutting unit an alternately in oppositedirections. The

Y abrading disc-19 is also bodily shiftable toward the cutting unit andis fixed to a revoluble' roller bearing 20, so as to bodily revolvetherewith, on the operation of the bearing. Fixed in the forward ends ofthe l sides 21 of an adjustable carrier 22 is a stationary shaft 23 uponwhich the bearing is revolubly mounted. The bearing 20 is extended fromthe disc 19 and has fixedly secured thereto a driven pulley 24 toprovide for the revolving of the bearing 20 on the shaft 23 for theurpose of operating the disc 19. The bearlng 20 is connected to theshaft 23 in a suitable manner to prevent gllileflzearing from shiftinglengthwise of the The carrier 22 is slidably connected to the downwardlyinclined top 25 of a carriage 26. There is a dove-tailed connection 26between the carrier 22 and top 25. The

sides 21 of the carrier 22 project forwardly with respect to thecarriage 26 whereby the shaft 28 is suspended forwardly of the carecarrier 22 is manually adjustable for the purpose of shifting the disc19 to and from the cutting unit and for such purpose the top 25 of thecarriage is provided with annpstandin fixed lug 27 which inclinesforwardl an projects through anopening 28 forms in the carrier 22.Threadedly engaging with and extending through the lug an adjustingscrew 29 disposed at the same inclination as the inclination of thecarrier 22. The screw 29 is carried by a rear extensionBO on the hub 31of a beveled gear 321 The hub 31 is secured to the carrier 22 forwardlyof the lug 27. Meshing with theg'ear 32'is abeveled pinion 33 carried bya shaft 34 journaled in and projecting outward'ly from one of the sidesof the carrier 22. The outer end of the shaft 34 is provided with a handwheel 35 to facilitate the operation thereof.

The pulley 24 is driven from a twisted belt 37 operated by any suitablemeans.

The grinding mechanism includes a track forming member 38 for the carriae 26 and the latter is adapted to travel aternately in oppositedirections lengthwise with res ect to the track forming member 38. As ilustrated the track forming member is shown as mounted upon the .sideframes 10, 11 of the su porting structure for the machine .and saidmember 38 acts as a coupling means between the upper ends of the frames10 and 11. Holdfast devices 39 are employed for fixedly securing thetrack forming member 38 to the side frames 10, 11.

The shaft 23 is removably connected in any suitable manner to the sides21 of the carrier 22 to permit of expeditiously removing the shaft 23 toenable the substitution of a new'abrading disc when occasion requires.

Rotatablv supported in flanged bearings 40 mounted in the ends of themembers 38, as well as projectin from the bearings 40, is a shifting rod41 or the carriage 26. The rod 41 is peripherally threaded as at 42 andwith the threads 42 terminating adjacent one end of the rod 41 toprovide a nonthreaded portion 43.

Mounted on the rod 41 is an internally threaded sleeve 44 formed with anupwardly disposed lug 45 which extends into a socket 46 formed in thebottom of the carriage 26. Carried by the bottom of the carriage 26 is apair of spaced, depending, bifurcated arms 47 arranged in opposedrelation and between which is positioned the sleeve 44 and through whichextends the rod 41. The sleeve 44 is movable lengthwise of the rod 41,alternately in opposite directions and which provides for the travel ofthe carriage therewith, and as the latter is shifted the carrier 22 andabrading disc 19 will also be shifted in the same direction as, thecarriage 26. As the carrier shifts with the carriage the abrading discwill travel, while rotating lengthwise of the cuttin unit.

ne end of the rod 41 is provided with a stop collar 48. The non-threadedportion 43 of the rod 41 is provided adjacent the end of the member 38with a gear wheel 49 having an extended hub spaced from a bearing 40 bya collar 50. The gear wheel 49 is positioned adjacent the side frame 11of the su porting structure of the machine.

he top of the side frame 11 is cut away to provide a clearance 51 andsecured to the inner side of the frame 11, as well as projectinginwardly therefrom and further in alignment with the clearance 51 is abearing bracket 52 formed with a pair of bearing members 53, 54 whichOPP Q each other and are arranged in spaced relation. The bearing member53 extendsinto the clearance 51. Mounted in the bearing members 53, 54and projecting outwardly from the former is a transmission shaft 55 forthe screw rod 41.

Keyed to the shaft 55 is a driving pulley 56 therefor and which isprovided with an extended hub 57 which abuts the'bearing member 53.Loosely mounted oneach side of the pulley 56 is an idler, pulley. One ofthe idler pulleys is indicated at 58 and is loosely mounted on the shaft55 between the pulley 56 and the bearing member 54. The other idlerpulley is indicated at 59 and is mounted on the extended portion of thehub 57 of the pulley 56. The hub of the pulley 59 is extended to engagethe bearing member 53. The bracket. 52 is formed of two sections 60, 61detachably connected together. The section 60 carries the bearing member53 and the section 61 the bearing member cured to the side frame 11 by asuitable holdfast means.

That end of the shaft 55 which projects from the bearing member 53carries a pinion 62 positionedexteriorly of the side frame 11. Thepinion 62 meshes with the gear 59 for the purpose of driving it therebyrotating the screw rod 41.

The pulley 56 is alternately driven in a clock-wise and in ananti-clock-wise direction, to provide for the alternate travelling ofthe carriage 26 in opposite directions, and for such purpose anautomatically adjustable operating means is provided for the pulley 59.Said meansincludes a one-piece shifting member 63 for a pair of drivingbelts 64, 65. The belt 65 is twisted for the purpose of driving thepulley 59 in an opposite direction from that in which it is driven bythe belt 64.

The member GEE comprises a body portion 66 provided at its top with ayoke 67 and.

at one side of its lower portion with a. yoke 68. The yoke 67 has thebelt 64 passed therethrough and is employed for shifting the belt 64onto and off of the pulley 56 from pulley 59. The yoke 68 is used forshifting the belt 65 onto and off of the pulley 56 from the pulley 58.The belts 64 and 65 are alternately mounted on pulley 56, and when abelt is positioned thereon it is latched in driving position withrespect thereto until the carriage 26 reaches the limit of its travel inone direction.

The member 63 has its body portion 66 fixedly secured by holdfastdevices 69 near one end of a latchable, spring controlled shifting barfor the said member 68. The bar 80 projects through opposed slots 81, 82formed in the side frames 10 and 11. The slot 82 is of greater heightthan the slot 81 as the latterhas its endwalls arranged to The section60 is fixedly se- Secured to the outer face of the side frame we 11 isa" pivoted,counter-balanced latching member 84 which extends across theslot 81' and also in the'path of the notched end of I the bar 80. Theside frame 10 is provided with a supporting bracket 85 for the bar 80.

Depending from the carriage 26 and straddling the bar 80 is an actuatingarm 86 which is adapted to slide lengthwise of the bar 80 to engageresilient stops mounted thereon. The lower end of the arm 86 is ofinverted U-shape, as at 87, for the purpose of straddling the bar 80.The stops mounted on the bar 80 are indicated at 87, 88 and each ofwhich consists of a collar adjustably secured to the bar 80 and a coiledspring bearing against the collar. The lower end of the stop lever 86 ispositioned between the coiled springs of the stops and said springs areindicated at 89, 90. One of the stops is arranged in proximity to themember and the other of the stops in proximity to the bracket or support85. lVhen'the stops are engaged by the arm 86 the bar 80 is shiftedcarrying the belt shifting member 63 with the bar 80. When the arm 86engages the spring of the stop 88 the bar 80 is shifted in a directionwhereby the member 63 will move the belt 64 from off the pulley 56 andonto pulley 59 and move belt 65 from off of pulley 58 onto pulley 56.When the arm 86 engages the spring of the stop 89 it will shift the bar80 in a direction whereby the member 63 will move the belt 64 from offof pulley 59 and onto pulley 56 and move belt 65 from off of pulley 56and onto pulley 58. As bar 80 moves inwardly with respect to the frame11, the latching member 84 will coact with the notch of bar 80 and latchit in position whereby belt 64 will be held 'in'position on pulley 69 todrive the same.

When the bar 80 is shifted in a direction outwardly with respect to theframe 11, the latching member 84 will coact with another notch of bar 80and latch it in position whereby belt 65 will be held in position onpulley 56 to drive the same. The stops are adjustable and the springsthereof also act tions lengthwise of the cutting unit and the reverseirection of travel of the abrading element is bad automatically in viewof the structural arrangement heretofore set forth.

gm Further the abrading disc 19 is arranged relative to the cutting unitso that when opcrating on the latter it will sharpen the knives orcutters in a manner so that the cutting unit will be true round, undersuch conditions providin for auniform cut on the material u on w llChthe cutting element is operated. he abrading disc 19 is driven in adirection opposite to that in which the cutting unit is revolved. Theadjusting of the screw 29 can position the abrading disc relative to thecutting unit, or in other words, the screw 29 provides for the shiftingof the disc toward and from the cutting umt. The carrier is disposed atan inclination so that the disc 19 will operate upon the tog of thecutting unit.

t is well known that in leather shaving machines, the cutting unit issubjected to great pressure and a horizontal deflection takes place, butb having the grinder mechanism acting at t 1e to of the cutting unit atrue round is provide for the latter resulting as before stated inaccurate and uniform cutting. Insharpening the cutter unit of machinesnow in general use, it is the practice to grind the cutting unitimmediately behind the same in a horizontal plane, and as the unit isdeflected or bowed the effect of a hollow grind is produced resulting inirregular cutting of the work. This serious objection, however, isovercome by positioning the grinder mechanism, so it will act directlyupon the extreme top of the cutting unit, resulting as before stated ina true round after the unit has been sharpened.

It is thought the many advantages of a inder mechanism, in accordancewith this invention and for the purpose set forth can be readilyunderstood, and although the preferred embodiment of the invention is asillustrated and described, yet it is to be-understood that changes inthe details of construction can be had which will fall within the scopeof the invention as claimed.

What I claim is:

1. A. grinding mechanism for a cutter device comprising a'carrier, arotatable driven abradin element suspended from the carrier an adaptedto act upon said device 529, lengthwise thereof, a travelling carriagefor sgpporting the carrier, a latchable, reversi e propelling mechanismfor the carriage to provide for the alternate travel of the 'latter inopposite directions, a combined W latching and controlling means forsaid prong mechanism, and an arm bodily carried by the carriage forintermittently actusting said means to alternately latch and releasesaid mechanism in and from forward and reverse driving positions, saidarm straddling said means and said means including a pair of spaced,resilient abutments positioned in the path of said arm, said propellingmeans for the carriage having an element thereof extending into andconfined in the carriage.

2. A grinding mechanism for a cutter device comprising a carrier, arotatable driven abrading element suspended from the carrier and adaptedto act upon said device lengthwise thereof, a travelling carriage forsupporting the carrier, a latchable, reversible propelling mechanism forthe carriage to provide for the alternate travel of the latter inopposite directions, a combined latching and controlling means for saidpropelling mechanism, and an arm bodily carried by the carriage forintermittently actuating said means to alternately latch and releasesaid mechanism in and from forward and reverse driving positions, saidmeans including spaced, resilient abutments alternately engaged by saidarm during the travel of the carriage, that part of said means providingfor the latching of said propelling mechanism arranged at one end ofsaid means, and that part of said means providing for the controlling ofthe propelling mechanism arranged in proximity to the portion of saidmeans which provides for the latching of the propelling mechanism.

3. A grinding mechanism for a cutter device comprising a carrier, arotatable driven abrading element suspended from the carrier and adaptedto act upon said device lengthwise thereof, a travelling carriage forsupporting the carrier, a latchable, reversible propelling mechanism forthe carriage to provide for the alternate travel of the latter inopposite directions, a combined latching and controlling means for saldpropelling mechanism, and an arm bodily carried by the carriage forintermittently actuating said means to alternately latch and releasesaid mechanism in and from forward and reverse driving positions, saidpropelling means for the carriage having an element thereof extendinginto and confined in the carriage, that part of said means providing forthe latching of said propelling mechanism arranged at one end of saidmeans,and that part of said means providing for the controlling of thepropelling mechanism arranged in proximity to the portion of said meanswhich provides for the latching of the propelling mechanism.

4. A grinding mechanism for a cutter device comprising a carrier, arotatable driven abrading element suspended from the carrier and adaptedto act upon said device lengthwise thereof, a travelling carriage forsupporting the carrier, a latchable, reversible propelling mechanism forthe carriage to provide for the alternate travel of the latter inopposite directions, a combined latching and controlling means for saidpropelling mechanism, and an arm bodily carried by the carriage forintermittently actuating said means to alternately latch and releasesaid mechanism in and from forward and reverse driving positions, saidmeans including spaced, resilient abutments alternately engaged by saidarm during the travel of the carriage, said propelling means for thecarriage having an element thereof extending into and confined in thecarriage, that part of said means providing for the latching of saidpropelling mechanism arranged at one end of said means, and that part ofsaid means providing for the controlling of the propelling mechanismarranged in proximity to the portion of said means which provides forthe latching of the propelling mechanisnn 5. A grinding mechanism for acutter device comprising a carrier, a rotatable driven abrading elementsuspended from the carrier and adapted to act upon said devicelengthwise thereof, a travelling carriage for supporting the carrier, alatohable, reversible propelling mechanism for the carriage to providefor the alternate travel of the latter in opposite directions, acombined latching and controlling means for said propelling mechanism,and an arm bodily carried by the carriage for intermittently actuatingsaid means to alternately latch and release said mechanism in and fromfor- Ward and reverse driving positions, said arm straddling said meansand said means including a pair of spaced, resilient abutmentspositioned in the path of said arm, said propelling means for thecarriage having an element thereof extending into and confined in thecarriage, that part of said means providing for the latching of saidpropelling mechanism arranged at one end of said means, and that part ofsaid means providing for the controlling of the propelling mechanismarranged in proximity to the portion of said means which provides forthe latching of the propelling mechanism.

6. A grinding mechanism for a cutter device comprising a carrier, arotatable driven abrading element suspended from the carrier and adaptedto act upon said device lengthwise thereof, a travelling carriage forsupporting the carrier, a latchable, reversible propelling mechanism forthe carriage to provide for the alternate travel of the latter inopposite directions, a combined latching and controlilng means for saidpropelling mechanism, and an arm bodily carried by the carriage forintermittently actuating said means to alternately latch and releasesaid mechanism in and from forward and reverse driving positions, saidhereto. 7

WILLIAM A. TRAUD.

